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PATH: opt / alt / python311 / lib64 / python3.11 / lib2to3 / fixes

# Copyright 2007 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

"""Fixer that changes filter(F, X) into list(filter(F, X)).

We avoid the transformation if the filter() call is directly contained
in iter(<>), list(<>), tuple(<>), sorted(<>), ...join(<>), or
for V in <>:.

NOTE: This is still not correct if the original code was depending on
filter(F, X) to return a string if X is a string and a tuple if X is a
tuple.  That would require type inference, which we don't do.  Let
Python 2.6 figure it out.
"""

# Local imports
from .. import fixer_base
from ..pytree import Node
from ..pygram import python_symbols as syms
from ..fixer_util import Name, ArgList, ListComp, in_special_context, parenthesize

class FixFilter(fixer_base.ConditionalFix):
    BM_compatible = True

PATTERN = """
    filter_lambda=power<
        'filter'
        trailer<
            '('
            arglist<
                lambdef< 'lambda'
                         (fp=NAME | vfpdef< '(' fp=NAME ')'> ) ':' xp=any
                >
                ','
                it=any
            >
            ')'
        >
        [extra_trailers=trailer*]
    >
    |
    power<
        'filter'
        trailer< '(' arglist< none='None' ',' seq=any > ')' >
        [extra_trailers=trailer*]
    >
    |
    power<
        'filter'
        args=trailer< '(' [any] ')' >
        [extra_trailers=trailer*]
    >
    """

skip_on = "future_builtins.filter"

def transform(self, node, results):
        if self.should_skip(node):
            return

trailers = []
        if 'extra_trailers' in results:
            for t in results['extra_trailers']:
                trailers.append(t.clone())

if "filter_lambda" in results:
            xp = results.get("xp").clone()
            if xp.type == syms.test:
                xp.prefix = ""
                xp = parenthesize(xp)

new = ListComp(results.get("fp").clone(),
                           results.get("fp").clone(),
                           results.get("it").clone(), xp)
            new = Node(syms.power, [new] + trailers, prefix="")

elif "none" in results:
            new = ListComp(Name("_f"),
                           Name("_f"),
                           results["seq"].clone(),
                           Name("_f"))
            new = Node(syms.power, [new] + trailers, prefix="")

else:
            if in_special_context(node):
                return None

args = results['args'].clone()
            new = Node(syms.power, [Name("filter"), args], prefix="")
            new = Node(syms.power, [Name("list"), ArgList([new])] + trailers)
            new.prefix = ""
        new.prefix = node.prefix
        return new

[-] fix_urllib.py [edit]
[-] fix_standarderror.py [edit]
[-] fix_imports.py [edit]
[-] fix_getcwdu.py [edit]
[-] fix_nonzero.py [edit]
[-] fix_itertools.py [edit]
[-] fix_xrange.py [edit]
[-] fix_metaclass.py [edit]
[-] fix_methodattrs.py [edit]
[+] ..
[-] fix_ne.py [edit]
[-] fix_repr.py [edit]
[-] fix_zip.py [edit]
[-] fix_exec.py [edit]
[-] fix_print.py [edit]
[-] fix_paren.py [edit]
[-] fix_imports2.py [edit]
[-] fix_apply.py [edit]
[-] fix_ws_comma.py [edit]
[-] fix_dict.py [edit]
[-] fix_buffer.py [edit]
[-] fix_intern.py [edit]
[-] fix_next.py [edit]
[-] fix_itertools_imports.py [edit]
[-] fix_throw.py [edit]
[+] __pycache__
[-] fix_long.py [edit]
[-] fix_raw_input.py [edit]
[-] fix_future.py [edit]
[-] fix_exitfunc.py [edit]
[-] fix_renames.py [edit]
[-] fix_input.py [edit]
[-] fix_reduce.py [edit]
[-] fix_operator.py [edit]
[-] fix_numliterals.py [edit]
[-] fix_isinstance.py [edit]
[-] fix_basestring.py [edit]
[-] fix_filter.py [edit]
[-] fix_raise.py [edit]
[-] fix_types.py [edit]
[-] fix_funcattrs.py [edit]
[-] fix_set_literal.py [edit]
[-] __init__.py [edit]
[-] fix_execfile.py [edit]
[-] fix_unicode.py [edit]
[-] fix_reload.py [edit]
[-] fix_import.py [edit]
[-] fix_sys_exc.py [edit]
[-] fix_asserts.py [edit]
[-] fix_map.py [edit]
[-] fix_tuple_params.py [edit]
[-] fix_xreadlines.py [edit]
[-] fix_except.py [edit]
[-] fix_has_key.py [edit]
[-] fix_idioms.py [edit]